CN105705768A

CN105705768A - High-pressure fuel pump having a filter

Info

Publication number: CN105705768A
Application number: CN201580002605.7A
Authority: CN
Inventors: S.弗基拉特; U.尼格林; R.帕施; M.施密特
Original assignee: Continental Automotive GmbH
Current assignee: Vitesco Technologies GmbH
Priority date: 2014-09-03
Filing date: 2015-08-13
Publication date: 2016-06-22
Anticipated expiration: 2035-08-13
Also published as: CN105705768B; KR101907761B1; DE102014217625B4; WO2016034386A1; DE102014217625A1; KR20160090899A

Abstract

The invention relates to a high-pressure fuel pump (10) for applying pressure to a fuel (22), comprising: a fluid channel (46) for carrying a fluid, in particular a fuel (22), in the high-pressure fuel pump (10), the fluid channel (46) being formed in a housing (14) of the high-pressure fuel pump (10); and a filter device (50) arranged in the fluid channel (46), said filter device having a filter surface (68) for separating particles present in the fluid, the filter surface (68) having a curved filter surface region (70).

Description

There is the high pressure fuel pump of filter

Invention field

The present invention relates to for executing stressed high pressure fuel pump to fuel。

Background technology

In order to apply high pressure to fuel (such as, gasoline or diesel oil), then can use this type of high-pressure pump, in order to be therefore prevented from producing less desirable combustion product。Such as, the pressure in the scope of 200 bars to 300 bars is applied to gasoline, and the pressure in the scope of 2000 bars to 3000 bars is applied to diesel oil。

Usually described high pressure fuel pump being designed as piston pump, wherein piston applies pressure by means of moving up and down to the fuel in pressure space, and wherein piston usually drives via the eccentric installed on the driving shaft。

It is known that, for instance supplying fuel to pressure space via the entrance area of high pressure fuel pump, wherein entrance area is arranged in the region of the eccentric space of (such as) driving eccentric (drivingeccentric)。Generally being arranged in by fuel filter in the flow path of such as fuel from fuel tank to pressure space, fuel flows through this fuel filter at it on the route of pressure space, in order to it is possible to filter less desirable granule from fuel。Such as, this type of fuel filter is located in join domain, and the entrance area of high pressure fuel pump is connected to fuel tank by described join domain。Further, it is known that when bigger installing space can be provided, this type of fuel filter is loaded in special housing。

Defecator can also be arranged in other position in high pressure fuel pump, so that to the fluid (fuel being such as previously mentioned being flowing in high pressure fuel pump, and also have such as lubricating oil) it is filtered, and the element being therefore prevented from high pressure fuel pump is damaged due to the less desirable granule in corresponding fluids。

Especially bigger optimization in geometry in view of internal combustion engine, it is possible to provide structure space more and more less, and therefore must optimally use this structure space。

Summary of the invention

Therefore, the present invention aims at a kind of high pressure fuel pump with defecator of proposition, and it can optimally use available structure space。

This target is realized by the high pressure fuel pump of the feature with claim 1。

The favourable improvement of the present invention is the theme of dependent claims。

One has fuel channel for executing stressed high pressure fuel pump to fuel, and this fuel channel is used for transporting fluid, especially fuel, and this fuel channel is formed in the housing of high pressure fuel pump。Additionally, defecator is arranged in the fluid passage, and described defecator has the filtering surface for isolating the granule existed in fluid。Filtering surface has the filter surface area of bending。

In itself previously known defecator, especially, in conjunction with the fuel filter that the high pressure fuel pump being used in filtration high pressure petrolift fuel or other fluid flowed uses, is generally of the tubular geometry with straight line substrate。In this way, fabric face can be restricted, and therefore to obtain bigger strained volume, it is necessary to use relatively large defecator, because strained volume is directly proportional with effective filtering surface of defecator。Effective filtering surface is determined by straight line substrate。

Now in order to optimally use geometrically limited space, but not described straight line substrate, defecator has effective filtering surface of the filter surface area with bending, thus effective filtering surface expanded on the whole。Therefore, compared with when with the defecator of effective filtering surface with straight line, it is possible to by the strained volume that the conveying of described defecator is bigger。

The filter surface area of bending preferably employs domed design。" spherical " represents the section through said three-dimensional body at this, has dome-shaped design especially。Such as, the filter surface area of bending can have the shape corresponding to hemisphere, and therefore, it is possible to has spherical designs。

The filter surface area of bending advantageously has multiple impression。

The filtering surface that 3 D deformation (such as, the form in impression) that effective filtering surface has is more many, mutually flatter, the effective filtering surface that can be used for filtering is more big。Therefore, volume to be filtered can preferably further increase。Such as, effective filtering surface can deform in this way so that is initially formed domed filtering surface and makes this filtering surface be provided with one or more impression subsequently。

Defecator preferably has filter mount, and this filter mount limits filter mount volume, and wherein filter surface area is designed to arch, enters in filter mount volume especially。

In order to save space, expanding effective filtering surface, the filter surface area of bending is encircleed in filter mount volume simultaneously, i.e. enter in the inner space of defecator, and therefore only occupies the space under any circumstance assembled required for filter mount。

By means of the filter surface area of arch, therefore, it is possible to obtain the increase of effective filtering surface, and the installing space of defecator need not be expanded in process。

Filter mount advantageously has tubular geometry, and thus defecator can preferably load in (such as) hole in the way of particularly simple。

Filter mount advantageously has for defecator is fastened fastening area in the fluid passage。Additionally, filter mount preferably has the front area relative with fastening area and at least one lateral region。Effective filtering surface advantageously comprises the first filter surface area and the second filter surface area, and described first filter surface area is arranged on front area, and described second filter surface area is arranged in lateral region。

In this case, the filter surface area of arch can advantageously be at least a partially formed the first filter surface area or the second filter surface area or two filter surface area。

If filter mount designs in this way so that it advantageously can fasten via fastening area and therefore hold to the fluid passage of high pressure fuel pump, then do not need other tightening member or support body by defecator installation in systems。Therefore, a kind of high pressure fuel pump with defecator can be advantageously provided, described defecator is integrated in the housing of high pressure fuel pump, and preferably makes the user of high pressure fuel pump that high pressure fuel pump to have degree of freedom completely via method of attachment or via connecting device。

Additionally, advantageously, if (namely the effective filtering surface in defecator is not arranged only in basal region, it is arranged in the front area relative with the fastening area of filter mount), and it is arranged in filter mount lateral region, this is because in this manner it is possible to preferably effective filtering surface is configured with maximum size。

Defecator is preferably arranged in the ingate of high pressure fuel pump。Preferably, it is separately arranged in ingate for connecting fluid passage to inlet nozzle and the defecator of burning line。Therefore, inlet nozzle advantageously generates exemplary method of attachment, in order to ingate is connected to external combustion hopper。For this purpose, it is preferable that inlet nozzle is pushed in ingate。

Owing to inlet nozzle and defecator are preferably the element being formed separately from each other, the user of high pressure fuel pump advantageously has certain degree of freedom in the geometric configuration of inlet nozzle, and advantageously (such as) can assemble inlet nozzle by the predetermined method of attachment on product line。It is further advantageous that inlet nozzle does not serve as the tightening member of defecator or supports body, and in inlet nozzle, therefore it is not necessarily defecator offer structure space。

Defecator is preferably arranged in ingate, is positioned at inlet nozzle downstream part, contacts this inlet nozzle especially。Defecator preferably only inserts in ingate, and wherein said defecator is arranged in ingate through inlet nozzle。Thus, it is advantageous to inlet nozzle merely has to be inserted into high pressure fuel pump from outside, without considering to still have to hold to certain position place defecator。

If defecator advantageously directly contacts with inlet nozzle, then, before fuel enters the inner space of high pressure fuel pump, the fuel supplied advantageously is filtered in this contact area。

The ingate of high pressure fuel pump is preferably designed in this way so that the eccentric space of high pressure fuel pump is connected to the environment at burning line place by described ingate, it is contemplated that fuel is fed to high pressure fuel pump via described burning line。The filter mount volume (that is, the internal capacity of filter mount) of filter mount is advantageously arranged in this way so that it abuts directly against the access road formed in inlet nozzle。

Defecator is preferably more than the diameter of the access road connected in nozzle towards the opening of adjacent inlet nozzle at this。Therefore, the fuel supplied can advantageously directly introduce filter mount volume from access road in break-even situation, and therefore through effective filtering surface。

Advantageously, ingate adopts, at the downstream part of defecator, the design conically widened。Therefore, being preferably so that by more preferably through-flow of defecator can filter medium, for instance, fuel。

Advantageously, filter mount has the first ring and the second ring, described first ring is arranged on front side for fastening the first filter surface area, described second ring is formed in fastening area to be fastened in ingate by defecator, the diameter that wherein the second ring has is more than the diameter of the first ring, and wherein the first ring and the second ring are connected to each other by the web extended on the longitudinal direction of filter mount。

Second ring of filter mount preferably has antitorque protection device, and it advantageously prevents defecator to be distorted in ingate。

If it addition, ingate preferably has the protuberance for interacting with the second ring, then being advantageously able to only be arranged to be fixed in ingate by defecator by forming the second ring on filter mount。

Especially, protuberance is arranged in the end of the eccentric space pointing to high pressure fuel pump of ingate。Therefore, protuberance advantageously prevents defecator from slipping into eccentric space from ingate, and is simultaneously provided in the space in ingate for the connector for being inserted in ingate, for instance, inlet nozzle。

Effective filtering surface is formed by metal fabric or by plastic fabric effectively。Alternately, it is thus also possible to use filtering material, substituting the fabric grid being made up of metal or plastics, it has the less filter element opening passed through for fuel。

It addition, effectively filtering surface can part be formed by plastic fabric by metal fabric and part, this depends on the requirement applied on corresponding filter surface area。Such as, the filter surface area of arch can be formed by metal especially, and the filter surface area in the region of the lateral region of filter mount can be formed by plastics, or vice versa。

Accompanying drawing explanation

With reference to accompanying drawing, the favourable improvement of the present invention is described more fully below, wherein:

Fig. 1 illustrates the longitudinal sectional drawing of the high pressure fuel pump of the defecator with the filter surface area being provided with arch；

Fig. 2 illustrates the profile of the ingate of the high pressure fuel pump from Fig. 1, and wherein defecator and inlet nozzle are arranged together；

Fig. 3 illustrates the perspective view of the defecator from Fig. 2；

Fig. 4 illustrates the longitudinal sectional drawing of the defecator from Fig. 2；And

Fig. 5 illustrates the longitudinal sectional drawing of the alternative configuration of defecator。

Detailed description of the invention

Fig. 1 illustrates high pressure fuel pump 10, and it has cylinder cover 12, and this cylinder cover 12 is assembled in housing 14。Cylinder cover 12 is provided with cavity 16, and piston 18 is directed wherein such that it is able to the up and down motion by this piston applies pressure to the fuel 22 being arranged in pressure space 20。

Piston 18 is to be driven by roller tappet 24, and this roller tappet is operably connected to the eccentric 28 driven on axle 30 via roller 26。

Piston 18 via spring 32 drive axle 30 direction on pre-tensioner, this spring supporting is on the downside 34 of cylinder cover 12 and is supported on the latch plate 36 being fastened to roller tappet 24。

When driving axle 30 to rotate, moving up and down along the roller 26 driving the outer surface 38 of axle 30 to roll and transmit described translational motion to piston 18, this piston is in itself by means of translational motion cumulative stress in pressure space 20。

Fuel 22 is fed to pressure space 20 via suction line 40, and this pressure space is connected to via interface channel 42 and is wherein provided with the eccentric space 44 driving axle 30。

Fuel 22 introduces eccentric space 44 via fluid passage 46。For this purpose it is proposed, housing 14 has ingate 48, eccentric space 44 is connected to the environment 49 of high pressure fuel pump 10 by this ingate。

In order to protect high pressure fuel pump 10 from damage, the fuel 22 supplied is so filtered that and can leach less desirable granule from fuel 22。

For this purpose it is proposed, in an illustrated embodiment, defecator 50 is arranged in the fluid passage 46 of ingate 48。It is also possible to the various location in the housing 14 of high pressure fuel pump 10 arranges corresponding defecator 50, for instance, it is arranged in interface channel 46 or in suction line 40, both of which is likely to be formed fluid passage 46。When described defecator 50 is positioned in corresponding position, additionally it is possible to by other fluid of this filtration devices, for instance, lubricating oil。

In an illustrated embodiment, for supplying fuel 22 from fuel tank (not shown), the inlet nozzle 52 as connecting element 54 inserts in ingate 48。In inlet nozzle 52, being provided with access road 56, fuel 22 is sent in defecator 50 via this access road。

The opening 58 of defecator 50 is at this diameter 60 more than access road 56, and thus allows for fuel 52 and be fed in defecator 50 in break-even situation。

For this reason, inlet nozzle 52 is also arranged in being directly adjacent to defecator 50 and contacting in ingate 58 with this defecator。But, defecator 50 and inlet nozzle 52 are two elements being separated from each other, and therefore when inlet nozzle 52 is not yet fastened to high pressure fuel pump 10, defecator 50 can be arranged and secured within ingate 48 simply。In the present embodiment, defecator 50 is simply plugged in ingate 58, and is fixed against skidding off outside housing 14 by inlet nozzle 52。Thus, can be connecting element 54(such as, inlet nozzle 52) more degree of freedom when providing when being integrally formed than defecator 40 and inlet nozzle 52。

Defecator 50 is arranged in the downstream of inlet nozzle 52, and therefore inlet nozzle 52 can be simply plugged in ingate 48, is likely to be fastened with defecator 50 at ingate place。

In order to need not be provided that defecator 50 is fixed in ingate 48 or uses inlet nozzle 52 to support defecator 50 or to be fixed on inlet nozzle by described defecator by other tightening member, ingate 48 has protuberance 62, and defecator 50 is arranged on this protuberance。At the downstream part of defecator 50, ingate 48 is conically widened, in order to consequently allows for fuel 22 and flows through in a better way to eccentric space 44。

Fig. 2 illustrates the more detailed view of the fluid passage 46 with defecator 50 and inlet nozzle 52。

Defecator 50 has the filter mount 64 with filter mount volume 66 and effective filtering surface 68。

As seen from Figure 2, in the present embodiment, effective filtering surface 68 designs arching and enters in filter mount volume 66 and therefore have the filter surface area 70 of arch。

Therefore, the filtering surface 86 that can be used for filtering fuel 22 expands, and prevents take up other structure space, because filtering surface 68 is by encircleing filter mount volume 66 expanded under any circumstance fastened required for defecator 50。According to available structure space, filter surface area 70 also can bend in different directions, for instance may be designed to outwards overarch。

Fig. 3 and Fig. 4 illustrates the detailed view of defecator 50。

As clearly visible from Figure 3, filter mount 64 has fastening area 62 and the front area 74 relative with fastening area 72。Lateral region 76 is located between fastening area 72 and front area 74。Filtering material 78 is arranged in both front area 74 and lateral region 76。Therefore, the first filter surface area 80 is formed in the front area 74 of defecator 50, and the second filter surface area 82 is arranged in the lateral region 76 of defecator 50。

In order to support filtering material 78, the filter mount 64 on front area 74 has the first ring 84, and the first filter surface area 80 is fastened to the first ring 84。In fastening area 72, filter mount 64 has the second ring 86, and its diameter 88 is more than the diameter of the first ring 84, and defecator 50 is firmly held in ingate 48 by the second ring。For stable defecator 50, the web 90 making the first ring 84 and the second ring 86 be connected to each other is set。

Filtering material 78 is arranged in all regions between ring 84,86 and web 90, in order to be derived from effective filtering surface 68 big as far as possible。

Can presenting together as passed through observation Fig. 3 and Fig. 2, the second ring 86 interacts with the protuberance 62 in ingate 48, and is therefore maintained in ingate 48 by defecator 50 so that described defecator cannot slip in eccentric space 44。

So that promote as far as possible in inlet nozzle 52 to ingate 48, the protuberance 62 of defecator 50 is kept to be arranged in end 92 place being positioned at contiguous eccentric space 44 of ingate 48。

By observing what Fig. 2 and Fig. 4 can present together, effective filtering surface 86 has the filter surface area 70 of arch in front area 74。According in the configuration of Fig. 4, described filter surface area has domed design, has spherical form especially。

Alternately, but, as shown in such as Fig. 5, the filter surface area 70 of arch also can have one or more impression 94, and it expands effective filtering surface 68 further。

It addition, effectively filtering surface 68 can design the impression 94 being arranged in lateral region 76, in order to expand filtering surface 68。But, this is only preferred configuration。

Metal fabric 96 or plastic fabric 98 can serve as filtering material 78, but it is also possible that and are used for together in defecator 50 by both filtering materials 78。

Generally speaking, defecator 50 provides the probability of the fluid (fuel 22 such as supplied) of flowing in filtration high pressure petrolift 10 via burning line 100, specifically, this filtration adopts effective filtering surface 68 to carry out, and this effective filtering surface 68 expands compared to conventional tubular filtering surface 68 and prevents take up bigger structure space。

Reference numerals list

10 high pressure fuel pumps

12 cylinder covers

14 housings

16 cavitys

18 pistons

20 pressure spaces

22 fuel

24 roller tappets

26 rollers

28 eccentrics

30 drive axle

32 springs

On the downside of in the of 34

36 latch plates

38 outer surfaces

40 suction lines

42 interface channels

44 eccentric space

46 fluid passages

48 ingates

49 environment

50 defecators

52 inlet nozzles

54 connecting elements

56 access roades

58 openings

60 diameters

64 filter mount

66 filter mount volumes

68 filtering surfaces

The filter surface area of 70 arches

72 fastening areas

74 front areas

76 lateral region

78 filtering materials

80 first filter surface area

82 second filter surface area

84 first rings

86 second rings

88 diameters

90 webs

92 ends

94 impressions

96 metal fabrics

98 plastic fabrics

100 burning lines

Claims

1. one kind is used for executing stressed high pressure fuel pump (10) to fuel (22), and described high pressure fuel pump (10) including:

-fluid passage (46), described fluid passage (46), for transporting fluid in described high pressure fuel pump (10), transport fuel (22) especially, and wherein said fluid passage (46) are formed in the housing (14) of described high pressure fuel pump (10)；

-defecator (50), described defecator (50) is arranged in described fluid passage (46), and has the filtering surface (68) for isolating the granule existed in described fluid,

Wherein, described filtering surface (68) has the filter surface area (70) of bending。

2. high pressure fuel pump (10) as claimed in claim 1, it is characterised in that the filter surface area (70) of described bending has spherical design, has spherical designs especially。

3. the high pressure fuel pump (10) as according to any one of claim 1 and 2, it is characterised in that the filter surface area (70) of described bending has multiple impression (94)。

4. high pressure fuel pump (10) as claimed any one in claims 1 to 3, it is characterized in that, described defecator (50) has filter mount (64), described filter mount (64) limits filter mount volume (66), wherein said filter surface area (70) is designed to arch, and special arch enters in described filter mount volume (66)。

5. the high pressure fuel pump (10) as according to any one of Claims 1-4, it is characterized in that, described filter mount (64) has the fastening area (72) for being fastened on by described defecator (50) in described fluid passage (46), the front area (74) relative with described fastening area (72) and at least one lateral region (76), wherein, described filtering surface (68) has the first filter surface area (80) and the second filter surface area (82), described first filter surface area (80) is arranged on described front area (74), and described second filter surface area (82) is arranged in described lateral region (76), wherein, the filter surface area (70) of described bending is at least a partially formed described first filter surface area (80) and/or described second filter surface area (82)。

6. the high pressure fuel pump (10) as according to any one of claim 1 to 5, it is characterized in that, described defecator (50) is arranged in the ingate (48) of described high pressure fuel pump (10), wherein, especially, the inlet nozzle (52) for described fluid passage (46) are connected to burning line (100) is separately arranged in described ingate (48) with described defecator (50)。

7. high pressure fuel pump (10) as claimed in claim 6, it is characterised in that described defecator (50) is arranged in described ingate (48), is positioned at described inlet nozzle (52) downstream part, especially, contacts described inlet nozzle (52)。

8. high pressure fuel pump (10) as claimed in claim 7, it is characterized in that, described defecator (50) inserts in described ingate (48), and wherein especially, described defecator (50) is arranged in described ingate (48) by means of described inlet nozzle (52)。

9. the high pressure fuel pump (10) as according to any one of claim 6 to 9, it is characterised in that described ingate (48) have, at the downstream part of described defecator (50), the design conically widened。

10. the high pressure fuel pump (10) as according to any one of claim 6 to 9, it is characterized in that, described filter mount (64) has the first ring (84) and the second ring (86), described first ring (84) is arranged on described front area (74) to be used for fastening described first filter surface area (80), and described second ring (86) is formed in described fastening area (72) to be fastened in described ingate (48) by described defecator (50), the diameter (60) that described second ring has is more than the diameter of described first ring (84), wherein said first ring (84) and described second ring (86) are connected to each other by the web (90) extended on the longitudinal direction of described filter mount (64)。

11. high pressure fuel pump (10) as claimed in claim 10, it is characterized in that, described ingate (48) has the protuberance for interacting with described second ring (86), especially, described protuberance is arranged in the end of the eccentric space (44) of the described high pressure fuel pump of the sensing (10) of described ingate (48)。